I have visited the walled town of Avignon on a school trip few years ago. The city is beautiful and totally deserves its place on the WHS list. Our visit started from the bridge, or more precisely, half of it, which definitely is one of the highlights of this site. The bridge is impressive and unique, which corresponds to its interesting history. There is a legend about the origins of the bridge, which I also found interesting. Then, we visited the palace and had a pleasant walk around this charming city. It is very easy to get lost there, but even easier to fall in love in the place! I definitely recommend it to everyone. Another important sight of the town is the Notre-Dame Cathedral. The old town is compact, so I feel like 1-2 days is enough to see the most important sights, but it is worth visiting anyway.